At fifth level, a gemini templar gains the ability to rend her opponent's very timeline. As an immediate reaction when successfully dealing damage, she may force the target to make a Will save (DC 10 + 1/2 gemini templar level + Wisdom modifier) or suffer from the effects of the gemini templar's current linewracks, as listed below. This is not a mind-affecting effect. Success may still cause them to suffer from a limited effect.
At fifth level and every four levels thereafter, a gemini templar chooses a new linewrack. She also gains one use per day of linewrack at these levels.
5th level linewracks.
Loopback (Su).
By warping a target's timeline to feed back into itself, a gemini templar can stun their target for 1d4+1 rounds. While at least one target is stunned by this ability, the gemini templar and her allies gain double her insight bonus from dual timeline as a bonus to damage rolls against targets stunned by loopback.
Lesser havoc (Su).
By twisting a target's future, a gemini templar can force their target to roll their first saving throw or attack roll during or after the gemini templar's round each round twice and take the lower result. This effect lasts for 4d4 rounds and begins immediately.
Wild time (Su).
By switching around several sections of time, a gemini templar can make a target perceive the wrong chronological order of events, causing them to treat all enemies besides the gemini templar as having a 50% miss chance, as displacement, for 1 round per class level of the gemini templar. The gemini templar is treated as having mirror image with 3 images that are only apparent to the target. During this time, whenever the gemini templar deals damage to this target, they become staggered for 1 round.
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9th level linewracks.
Shatter future (Su).
A gemini templar learns how to separate individual timelines from the braid of the material plane. Any target that suffers from her linewrack must make a Fortitude save (DC 10 + 1/2 gemini templar level + Wisdom modifier) or immediately die of old age. Targets immune to aging effects instead take 1d6 typeless damage for every class level of the gemini templar, ignoring DR and hardness. A restoration cast in the round immediately preceding any attempt to raise dead can restore the target's youth, allowing the raise attempt to take effect. The gemini templar must be at least 9th level to choose this linewrack. Note: To suffer from a linewrack, a target must fail their initial Will save. This Fortitude save does not replace that save.
Lesser voice of the void (Su).
A gemini templar has collected knowledge of many of the lost souls of the void between times and knows how to inflict upon others the pain of the knowledge of their fates and their screams. Any target that suffers from her linewrack takes 1d4+1 Wisdom bleed damage and 1d4 negative levels. Every round for the next 2 rounds, the gemini templar gains 2 Wisdom for 1 hour. The gemini templar must be at least 9th level to choose this linewrack.
13th level linewracks.
Greater havoc (Su).
A gemini templar can so greatly disturb a target's future that it begins to affect the fates of their nearby allies. At the start of the gemini templar's round every round for the duration of lesser havoc, roll 1d4. The gemini templar may choose up to that many additional targets within 60' of the affected target to be affected as if by lesser havoc, but only for that round. The gemini templar may choose these additional targets even if the initial target is dead, unconscious, has surrendered, or otherwise been defeated; however, they must still be physically present. In addition, the struck target must now roll three times and take the worst result. Finally, the duration is extended to 4d4 hours. The gemini templar must have lesser havoc and must be at least 13th level to choose this linewrack.
Screaming void (Su).
A gemini templar can make a target intimately familiar with all possible futures, instantly blinding them to the present. A target affected by screaming void becomes panicked and helpless for 1d4+1 months. The gemini templar must be at least 13th level to choose this linewrack. This is a mind-affecting ability.
Greater voice of the void (Su).
A gemini templar achieves complete knowledge of the void between times. Whenever a target suffers from her linewrack, the gemini templar gains 2 additional Wisdom every round, and the target takes another 1d4 negative levels. The gemini templar must have lesser voice of the void and must be at least 13th level to choose this linewrack.
17th level linewracks.
Love of the void (Su).
The gemini templar becomes one with the space between times. The gemini templar's linewrack DC increases by +6. The gemini templar must be at least 17th level to choose this linewrack.
Hate of the void (Su).
The gemini templar can create a warp in time that affects more than just her target. Whenever a target is affected by the gemini templar's linewrack, the gemini templar may also target up to 1d4+1 other targets within 60' with her linewrack. They gain a +1 to the save for every other target closer to the primary target, including the primary target himself; if tied, choose one and treat them as farther. The gemini templar must be at least 17th level to choose this linewrack.
Love of the braid (Su).
The gemini templar becomes intimately tied to the braid of the timelines of the material plane. Whenever a target is affected by the gemini templar's linewrack, she automatically saves against all spells and spell-like abilities that allow a save for 1d4+1 rounds. During this time, spells which do not normally allow a save instead allow a Will save at -4. This ability does not automatically save against such spells. She may choose to lower this defense long enough to allow any particular spell to affect her (for example, to be affected by a cure spell). The gemini templar must be at least 17th level to choose this linewrack.
Hate of the braid (Su).
The gemini templar becomes capable of tricking time itself into submission, allowing her to act in two ways at once. Whenever a target is affected by the gemini templar's linewrack, the gemini templar may create a duplicate of herself in an adjacent square. This duplicate does not have the dual timeline ability, but is otherwise treated as using the same character sheet simultaneously. It has all current effects of the gemini templar. Any spells that this duplicate uses are likewise immediately struck from the gemini templar's spells per day or spells memorised. Likewise, any uses per day of class abilities or feats are immediately struck from the gemini templar's uses per day, and any damage she takes is immediately applied to the gemini templar. The gemini templar and her duplicate share suffering from all conditions, but only one can be affected by any single ability with multiple targets (thus, a fireball is not applied twice). The duplicate acts immediately after the gemini templar completes this turn, and after 1d4+1 of its own rounds, disappears at the beginning of the gemini templar's turn. The gemini templar must be at least 17th level to choose this linewrack.